What are 2 methods sciebtists use to determine the evolutionary history of a species?

What is the relationship between distance and mass in termsnof gravitational force

A very elastic rubber ball is dropped from a certain height and hits the floor with a downward speed v. Since it is so elastic, the ball bounces back with the same speed v going upward. Which of the following statements about the bounce are correct

Can more than two waves can interfere in a given medium

Period measures the time taken for a complete cycle of repetitive motion (oscillation/vibration). a. A swinging pendulum takes an average of 10.3 seconds to complete 10 cycles. What is the period of the pendulum?

Calculate the speed of a 3.5cm sound wave of frequency 8000Hz

What property of sound enables us to distinguish one sound source from another?

The table below shows the right ascensions of two stars at a location. Star 1 - 4 right ascension (in Hour) Star 2 - 3 right ascension (in Hour) Which of these statements is correct about the stars?

H-2 + H-3 → He-4 + Consider the nuclear reaction that takes place in the sun. Two nuclides of hydrogen fuse to form helium. Is helium the only product of this reaction? If no, identify any additional products. A) Yes, He-4 is the only product. B) No.

Hat is a scientific theory? Make up your own scientific theory.

Which of the following is an example of a velocity? O A. 12 m/s O B. 45 km/hr south O C. 55 km/hr D. - 5 m/s2 east